1. The Cardiac Electrical System

  1. Richard N. Fogoros

Published Online: 16 JUL 2012

DOI: 10.1002/9781118399613.ch1

Electrophysiologic Testing, Fifth Edition

Electrophysiologic Testing, Fifth Edition

How to Cite

Fogoros, R. N. (2012) The Cardiac Electrical System, in Electrophysiologic Testing, Fifth Edition, John Wiley & Sons, Ltd, Chichester, UK. doi: 10.1002/9781118399613.ch1

Author Information

  1. Pittsburgh, PA, USA

Publication History

  1. Published Online: 16 JUL 2012
  2. Published Print: 29 AUG 2012

ISBN Information

Print ISBN: 9780470674239

Online ISBN: 9781118399613



  • heart rhythm disorders, basic principles;
  • the cardiac electrical system;
  • heart's electrical system, fundamental to cardiac function;
  • anatomy of the heart's electrical system;
  • cardiac action potential, misunderstood in cardiology;
  • transmembrane potential;
  • depolarization phase, action of the action potential;
  • repolarization of cardiac cells, complex and poorly understood;
  • localized differences, in cardiac action potential;
  • QT interval, and average action-potential of ventricular muscle


This chapter contains sections titled:

  • The anatomy of the heart's electrical system

  • The cardiac action potential

  • Localized variations in the heart's electrical system

  • Relationship between action potential and surface ECG